[sr-dev] git:5.2:55f5c820: topoh: improve checks for contact header processing

[Henning Westerholt]

Module: kamailio
Branch: 5.2
Commit: 55f5c820655c3b53863043569f05b97ad615abbc
URL: https://github.com/kamailio/kamailio/commit/55f5c820655c3b53863043569f05b97ad615abbc

Author: Henning Westerholt <hw at kamailio.org>
Committer: Henning Westerholt <hw at kamailio.org>
Date: 2019-02-25T16:48:02+01:00

topoh: improve checks for contact header processing

(cherry picked from commit 101670ac2c120cf0008a860b6a766aaa529e578d)

---

Modified: src/modules/topoh/th_msg.c

---

Diff:  https://github.com/kamailio/kamailio/commit/55f5c820655c3b53863043569f05b97ad615abbc.diff
Patch: https://github.com/kamailio/kamailio/commit/55f5c820655c3b53863043569f05b97ad615abbc.patch

---

diff --git a/src/modules/topoh/th_msg.c b/src/modules/topoh/th_msg.c
index a3b6ab5f29..8b8d278b25 100644
--- a/src/modules/topoh/th_msg.c
+++ b/src/modules/topoh/th_msg.c
@@ -275,6 +275,11 @@ int th_mask_contact(sip_msg_t *msg)
 	}
 
 	c = ((contact_body_t*)msg->contact->parsed)->contacts;
+	if(c == NULL)
+	{
+		LM_ERR("invalid contact header\n");
+		return -1;
+	}
 	in = c->uri;
 
 	out.s = th_mask_encode(in.s, in.len, &th_uri_prefix, &out.len);